Flow control valve



FIG. 1 is a front, top, and right side perspective view of a flow control valve;

FIG. 2 is a front, bottom, and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.

The broken lines in the drawings illustrate portions of the flow control valve that form no part of the claimed design. 

CLAIM The ornamental design for a flow control valve, as shown and described. 